Flight Instructors Training Procedures _revised AIC_x

IMPORTANT:
ENTRY CHARACTERISTICS RECOVERY
This lesson is based on a
deliberately induced erect spin to
the left. (Piper Cherokee 140)
SAFETY:
Calculate weight and Balance
for utility category manoeuvre.
Carry out HASELL checks
Line up overhead a distinct
line feature e.g. coastline.
Height is calculated according to the
specific aircraft type spin
characteristics.
E.g. PA28.140 looses 500’ for each
rotation of spin.
(A spitfire fighter loses 5000’ for each
rotation .
A fighter jet can lose up to 20 000’
before recovery)
CONTROL INPUTS:
• Reduce speed in level flight, power
off, clean configuration to ± 75 MPH
• Simultaneously and abruptly apply
FULL LEFT RUDDER and FULL
UP ELEVATOR and hold the
controls FULLY against the stops.
• The aircraft will pitch nose up
(STALL) and yaw (LEFT WING
WILL STALL AND DROP) causing
autorotation. HOLD THE
CONTROLS FULLY DEFLECTED.
BASED ON CHEROKEE 140
TWO ROTATION SPIN
• Steep nose-up pitch initially followed
by wing drop to the left.
• Low airspeed.
• Nose rapidly pitches down yawing
towards the left wing as autorotation
starts.
• The first rotation accelerates as the
first 360° change of direction is
completed.
• The second rotation is considerably
faster with a near vertical nose down
attitude.
• The airspeed is relatively low.
*)
Since the aircraft is stalled and yawed
(Autorotation) we need to stop the yaw
and unstall the aircraft.
The following is based on the standard
recovery procedure placarded in the
Cherokee 140.
• Confirm power off.
• Ailerons neutral.
• Apply FULL OPPOSITE RUDDER to
the direction of rotation and ...
• Apply positive forward movement of
the control column TO THE CENTRE
POSITION.
Do not apply control column fully
forwards as this will induce inverted
flight!
• As rotation stops centralise rudders
and simultaneously ease the A/C out
of the dive.
• As the nose cuts the horizon check the
airspeed is below 100mph and apply
full power.
• Climb back to entry altitude and carry
out after take-off and HELL checks.
Note: The height loss
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